Wire crimping and cutting pliers



March 5, 1957 H W SE1-[ER 2,783,483

WIRE CRIMPING AND CUTTING PLIERS Filed Sept. 19, 1955 2V /Z 27 S /Za234,

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IN VEN TOR.

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WIRE CRIMPING AND CUTTING PIIERS;

Henry W. Seher, Elkins ParkPa.,' y assignor. to Ehilco Corporation,Philadelphia, Pa., acci-porationV of` Pennsylvania Application September19, 1955;.SerialNo. 534,910'

2. Claims (CLJ-5.6).

This invention relates to-metal forming and` shearingtoolsL and" hasas-its general objective the provision-fof pliers, or' similar devices,having'cooperatingljaw means provided with' both wire bending andicutting elements. While of 'broader utility, pliers embodying` theprinciplesv of kmy invention are especially adaptedforfusefin theel'd ofso called printed wiring.

inthe art ofprinted wiringit-isfrequentlythefpractice toattachvcomponents to panels, th'rougglrtheeagency of the component leadwires. In attaching -a'componentby'- thismethod-itsleadwiresare iirstinserted through aper-lA tures that pierce both the insulatingVpaneland'tlie conduc#r tive strips which define the printedwirecircuit; The wires areithen cut-to` desired' lengthsand'bentltoiwardfth'e printed wire circuit carried' by the panel.Follcwingfthis` operation, and in order permanently to`attacli1the com'-poncnt, the leadwiresl are soldered, by known' means; t'o. the'printedwiring. In order to obtain optimum'. solderE connections, particularlywhen dipsoldering, itis^common, prior to soldering, to form secondarybends inthe leadlwires. Secondary, or reverse, bendingfofafwire lead inconjunction with the'first bend' as described; resultsvin` a congurationcharacterized by a generally; Uf-sliapedtailf of wire having one legadjacent, and-its other legfextending' away from, the printed wirepanel. It is an object of this invention tol provide a simple hand toolthat will form component lead wires adapted for attachment by thismethod.

It is another object of this inventiontofprovide alpliers which willboth crimp and cut a wireina single movement of its jaws.

In.- the accomplishment of these objectives, the-present inventioncontemplates the provision of plier jaws that will engage a wire, forexample a wire extending through an aperture of a printed wire panel,sever an end portion of the wire, bend a first portion of the remainingwire toward the panel, and bend an adjacent second portion of the wireaway from the panel and at an angle to the lirst bent portion.

The manner in which the objects and advantages of the invention may bestbe achieved will be clearly understood from a consideration of thefollowing description, taken in conjunction with the accompanyingdrawing in which:

Figure l is a plan view of a plier tool having jaw means that include anembodiment of my invention;

Figure 2 is a fragmentary view illustrating the way in which the plierjaws engage a wire lead of a component to be mounted upon a printed wirepanel;

Figure 3 is similar to Figure 2, and shows the condition after closingof the jaws upon the wire;

Figure 4 is similar to Figure 3, but illustrating release of the jawsfrom the wire; and

Figure 5 illustrates a modified embodiment of the plier jaw means.

Now making more detailed reference to the drawing, and particularly toFigure 1 thereof, there is illustrated, by way of example, a plier toolhaving handles 11 y, 2,783,483 atented Mar. 5, 1957 integralwith jaws`or headmembers 12 and' 13. Handles 1'I; with'their'respective'jaws 12and. 13; are swiveled upon' pivot pin114therebygproviding' for movementof the jaws toward and away from' each other. The jawsfurtherinclude`cooperatinggrippingl surfaces 1'5 and 1'6, and,disposed", adjacent the gripping surfaces'and transverse the outer.ends' of the' jaws; are complementary'cutting edges sti'owniatIT and ISEdgeM 1.7"overlies`itsf complementary cutting edge` 18, and fi'nrmsA aportion* of :an upstandingV flange lZ5' which also lies transversejaw12.; Upstanding flange 25 further includes a rounrlf'e'dv edgeportion; or surface,="34-wliiclr1extend"s downwardlyfrom cutting'Y edge17 irrtlredirecticnoftlie free end? portion'of jaw 12'. The Qutexendiof` jaw13 includesa web-like section Ziladjacent`l cutting' edge` 18,and a: tiange 19 is' carried at the onterendothcjawby tliejweb; Flange19; web 20,' andI versely'of the jawf13: .This groove 21` is presentedto? wardi the opposite jaw 1211 Similarly the outer end. of jaw 12,includes outeringe ZZI'and' web 23; both of which, along with' flange25; form a channel-like groove 24wliich liestransverse"jawY 12. Theopen' side of groove Z'ltfa'ces'inthe directiomoffitscomplementarygroove 21, andi with'the jaws;in closedwire engaging position (FigaUre3f)it= can'be seen tliat flange22advantageous1y overliesiiange 19's,"forreasonstobe hereinafterv more fully explained j Inalniodiii'ediembodiment of "my invention (Figure 5) there are shown.plier jaws. 12a and`13a'having coniplementary cutting edges" ITaand 18hfrmedintegrally with' their? respective' jaws: These cutting edges, 17aand, 18a; are adjacent, respectiveA inner gripping faces 1521i and* 16h,andJ cutting edge' 18a: fo'rmsa` portion of' ilange Z'S; Upstandinghange25a' further includes a; rounded"ed`ge portion, or" surface, 34u whichextends downwardly from' cutting'- edge 17"'in the direction of the freeendportin'ojaw 12a;V A'ttachedtto'the outer face of jaw 13a is. an anglemember 26 which includes; a mounting;portion 21lavtlirougli which passscrews S", and a leg portionv 19a'l which"v forms the outer llange ofwjaw 13a. Similarly, angle memberZT is'attached to an outer face oibjawy12h bymeans'of screws S passingthrough a mounting portion 23u: A leg 22aformsthe` outer flange oiijawIZ'andoverlies'ange 19a of"jaw 13a.lGrooves 21u and 24r'areforrned bythe' cooperating cutting edges and'an'ge" members.

I In' perfomance of thewire bending operation, and consideringtheplers'oftl'ie invention as being used in the fabrication of printedcircuitry, it will now be under.- stood that there is provided a printedwire panel 28 (Figure 2), including an insulating sheet 29 and printedcircuit portions 30. Apertures 31 are provided in the panel 28 throughwhich leads 32 of a component 33 have been passed. (inasmuch as bothleads are to be cut and bent in an identical manner, the ensuingdescription is com cerned with but a single wire lead.) In mountingcomponent 33 to panel 28, the plier jaws are opened and anged portion 22(Figure 2) of plier jaw 12 is brought to bear against panel 28, in theregion of printed circuit 30 and adjacent a wire lead 32, in a mannercausing the extended wire lead 32 to be disposed transverse the grooves21 and 24 and between the gripping faces 15 and 16. The plier jaws arethen closed upon the wire 32, whereupon ange 19, by virtue of its beingspaced inwardly from overlying lip 22, is urged against the wire lead.Further pressure upon the wire-as results from further closure of thejaws upon the wire-by flange 19 (Figure 2) causes an initial bend of thewire 32 to take place about anvil-like flanges 22 and 25 of jaw 12. Theinitial bending is closely followed by engaging of an end portion of thewire by the cutting edges 17 and 18. A

final exertion of pressure (Figure 3) upon wire 32, severs Y an endportion 32a of the wire through the agency of cutting edges 17 and 1S.

A portion of the remaining lead wire is bent in a leverlike action, byflange 19, about flange 22` as a fulcrurn. Simultaneously with theforegoing bend, the hairpin 3211, or reverse bend desired, is formed bya lever-like wiping action of the rounded edge portion 34, carried byflange 25, against the end portion of the wire 32 which moves aboutliange 19 as a` fulcrum. The severed wire 32a is then gripped by thejaws and the travel of the jaws is thus advantageously limited.Additional pressure upon the bent wire, which may damage this portion ofthe'wire, is thereby prevented. l Y t As can now be seen (Figure 3) fromthe foregoing description the plier jaws have advantageously severed theexcess portion ofthe lead wire, and a ange of one jaw has forced theremaining wire into a lgrooved portion of another jaw to form thedesired reverse bend, or crimp.

To complete the bending operation the plier jaws are opened (Figure 4)thereby permitting the severed wire to fall from the jaws, andreleasingthe bending elements of the jaws from the bent wire leads. I, l

In the bending operation using the embodiment Villustrated in Figure 5,which is identical with thebending operation already described, ange 22ais placed against the panel adjacent the wire to be crimped, whereuponthe plier jaws are closed upon theA wrie causing an end portion to besevered by cooperating cutting edges l17a and 18a. Bending of theremaining portion of'therwire cutting and crimping metal. It should befurther understood that the tool of this invention need not be limitedto cutting and crimping cylindrically formed metal wire, but mayadvantageously be utilized in cutting and crimping of metal having othercross sectional congurations, such as, for example, rectangular or ovalsections.

I claim:

1. A plier type wire cutting and forming tool, comprising a pair oflevers pivoted intermediate their ends to form confronting jaws and apair of opposed jawoperating handles, the free end portions of said jawsbeing provided with wirecutting and forming means ncluding: knife meanshaving a pair of cutting edges and structure defining a curved surfaceextending from the region of one of said cutting edges toward the freeend portion of one of said jaws, said knife means being operable, inresponse to closing of said jaws, to sever a Wire 2. For use in themanufacture of printed wiring panels or the like, a plier type cuttingand forming tool for severing and crimping a component lead-support wireextending through an aperture formed in a printed wiring panel, saidtool comprising: a pair of levers pivoted intermediate theirY ends toform handles on one side of the pivot and a pair of elongated opposedjaws disposed on -the opposite side of said pivot and mounted formovenient-toward and away from one another; means deningcooperating wirecutting elements extending transverse said jaws, the element carried byone ofV said jaws being of blade-like conliguration and having cuttingmeans disposed along one edge portion and a rounded surface portiondisposed adjacent said cutting means and adjoining said edge portion;web sections disposed adjacent andk extending away from said cuttingelements; the free ends of said jaws having flange portions carried byandextending transverse said web sections, one of said ilange portionsand its web section in combination with said blade-likev cutting elementforming a channel-like groove in Yone of said jaws, said groove beingpresented toward the other of said flange portions, and Ysaid otherflange ,portionA being adapted for movement into said groove, said oneange portion being adapted for placement against the printed wiringpanel adjacent the said component lead-support wire extending throughsaid panel in such manner that said wire extends transversely of saidange portions and said cutting elements, whereby closing of thejawssevers an end portion of the wire and elects bendingjnfv the remainingportion by said other flange portion moving into said groove.

References Cited in the lile of this patent UNITED STATES PATENTS456,966 Schweeters Aug. 4, 1891 1,887,732 Pagel et al. Nov. l5, 19322,212,888 Sunshine et al Aug. 27, 1940 2,279,068 Siebraudt Apr. 7, 19422,359,083 Carlson Sept. 26, 1944

